From 5f4d5049e09d0b692328b51e26d80a463c7a77fa Mon Sep 17 00:00:00 2001
From: thatmattlove <matt@hyperglass.dev>
Date: Tue, 14 Dec 2021 01:35:58 -0700
Subject: [PATCH] Properly handle empty/missing custom JS/HTML

---
 hyperglass/ui/pages/_document.tsx | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/hyperglass/ui/pages/_document.tsx b/hyperglass/ui/pages/_document.tsx
index 8865bde..ab3053d 100644
--- a/hyperglass/ui/pages/_document.tsx
+++ b/hyperglass/ui/pages/_document.tsx
@@ -13,8 +13,14 @@ interface DocumentExtra extends DocumentInitialProps {
 class MyDocument extends Document<DocumentExtra> {
   static async getInitialProps(ctx: DocumentContext): Promise<DocumentExtra> {
     const initialProps = await Document.getInitialProps(ctx);
-    const customJs = fs.readFileSync('custom.js').toString();
-    const customHtml = fs.readFileSync('custom.html').toString();
+    let customJs = '',
+      customHtml = '';
+    if (fs.existsSync('custom.js')) {
+      customJs = fs.readFileSync('custom.js').toString();
+    }
+    if (fs.existsSync('custom.html')) {
+      customHtml = fs.readFileSync('custom.html').toString();
+    }
     return { customJs, customHtml, ...initialProps };
   }